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<br />Durango RICD <br /> <br /> Co.mpetltlve I . Low PI <br />Location .. [l(scharge I Operating (hlQh Usage <br /> . . ft.3,- -. Dlscllarge <br /> . . !tec; (ctS) flow) . <br /> .- ... . . <br />Penrlth Lakes olympic, <br />470 I 250 525 Intemallon_ilI Events, <br />Australia. I Recreational. <br />L~ SttIHI' I O'ymp,.c, <br />50.0 ! 210 1067 Intematlanat Events, <br />Urgell, Spain Recreational. <br />Dickerson 600 I 200 931 Regional events. <br />Maryland, USA. Local training <br /> <br />FigureJ <br />Pumped Flow JJ'nitewater Course Data <br /> <br />. \ <br /> <br />Kot all courses aspire to host internationally-sanctioned events, nor should they. Hm,\-.ever, the <br />international-caliber courses are a good measure of a reasonable recreational flow, particularly the low <br />range, sincesin many cases .they require a paid admission. Presumably an inadequate facility would not <br />attract p~i3fStomer~ addition they typically do not enjoy unlimite-d water rights. Those located on <br />n~ra1ri\"ers are limited by the hydrology ofthe river on which they are located, taking into account <br />-{vater rights of others. Two of the courses pump water to recycle, which means that the cost of electricity <br />must be 'weighed against what the user is willing to pay. The lower range of flows at these facilities, <br />therefore, has been calculated to provide a reasonable experience for which a knowledgeable customer <br />would pay. <br /> <br />-' . <br /> <br />/. <br /> <br />While most of these courses are not located in active river channels, it is my opinion that through <br />adequate design, similar white\-vater performance can be obtained in appropriate r~ches of the river for <br />flows significantly less than those requested in the RICD. ~ <br /> <br />Design Experience. My professional design and physical modeling exierience includes the Confluence <br />Park Boat Chute in Denver, the Horseshoe Bend Boat Chute in Idaho/the Santa Fe Avenue Boat Chute <br />(physically modeled but not constructed) in Pueblo, the whitewater course of the 1996 Olympics on the <br />Ocoee River in Tennessee, and many other whitewater projects. Based upon this experience, it is my <br />opinion that the flows requested for this RICD are significantly greater that those needed to create a <br />reasonable recreational experience for the various anticipated uses in an efficiently designed whitewater <br />course constructed \-".ithin an appropriate reach of this river. <br /> <br />Design Experience b". Others. The draft paper by Goodman and Parr, presents a relationship between <br />flow, hydraulic drop, and the potential quality of a whitewater course. The following Figure 9 (c.anverted <br />to English units) is based upon a figure from this paper. From a flow perspective, the figure illustrates <br />that t10\."\;s in the range of 350 to 500 cfs can create slalom courses of international standard. \Vl1ile the <br />course on this river is oriented toward a wide range of users, it is my opinion that good whitewater <br />performance can be obtained in appropriate reaches of this river, at flows significantly less than those <br />requested in the RICD. <br />